/*
 * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
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 */

package javax.swing.plaf.nimbus;

import javax.swing.plaf.nimbus.AbstractRegionPainter.PaintContext.CacheMode;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.Insets;
import javax.swing.JComponent;

/**
 * A special painter implementation for tool bar separators in Nimbus.
 * The designer tool doesn't have support for painters which render
 * repeated patterns, but that's exactly what the toolbar separator design
 * is for Nimbus. This custom painter is designed to handle this situation.
 * When support is added to the design tool / code generator to deal with
 * repeated patterns, then we can remove this class.
 * <p>
 */
final class ToolBarSeparatorPainter extends AbstractRegionPainter {

  private static final int SPACE = 3;
  private static final int INSET = 2;

  @Override
  protected PaintContext getPaintContext() {
    //the paint context returned will have a few dummy values. The
    //implementation of doPaint doesn't bother with the "decode" methods
    //but calculates where to paint the circles manually. As such, we
    //only need to indicate in our PaintContext that we don't want this
    //to ever be cached
    return new PaintContext(
        new Insets(1, 0, 1, 0),
        new Dimension(38, 7),
        false, CacheMode.NO_CACHING, 1, 1);
  }

  @Override
  protected void doPaint(Graphics2D g, JComponent c, int width, int height,
      Object[] extendedCacheKeys) {
    //it is assumed that in the normal orientation the separator renders
    //horizontally. Other code rotates it as necessary for a vertical
    //separator.
    g.setColor(c.getForeground());
    int y = height / 2;
    for (int i = INSET; i <= width - INSET; i += SPACE) {
      g.fillRect(i, y, 1, 1);
    }
  }
}
